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MF-50 diesel 1962- Fuel in crankcase


 
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Bob-EastTN
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Joined: 11 Mar 2010
Posts: 10
Location: East Tennessee

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PostPosted: Fri Feb 08, 2013 11:22 am    Post subject: MF-50 diesel 1962- Fuel in crankcase Reply to specific post Reply with quote

I noticed oil level on dipstick had increased and smelled like fuel. I stopped running engine and checked the lift pump, seems ok. I replaced anyway. No help. It must be the injector pump seal. Replacement? seal or pump!
 
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samn40
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Joined: 06 Jun 2010
Posts: 4007


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PostPosted: Fri Feb 08, 2013 12:47 pm    Post subject: Re: MF-50 diesel 1962- Fuel in crankcase Reply to specific post Reply with quote

Before you go too far, check if the tractor has a heater element in the air intake manifold. These can sometimes go faulty and leak diesel past the rings into the sump. If it is not that or the fuel lift pump it is usually the seal in front of the injection pump....injectors can leak when the eengine is not running but usually not enough to fill the sump.
Let us know what you find....
Sam
 
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Dieseltech
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Joined: 29 Feb 2012
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Location: Indiana

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PostPosted: Fri Feb 08, 2013 3:33 pm    Post subject: Re: MF-50 diesel 1962- Fuel in crankcase Reply to specific post Reply with quote

Check the lift pump as Sam mentioned, this is the first place that usually leaks. Manifold thermostart can leak also, if removed it can be checked by trying to blow air through fuel inlet fitting while unit is cold. No air should get through if it is good. Last place is the injection pump, just resealed a 135 pump completely for the same trouble.
 
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chuck41
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Joined: 05 Mar 2009
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PostPosted: Sat Feb 09, 2013 1:46 pm    Post subject: Re: MF-50 diesel 1962- Fuel in crankcase Reply to specific post Reply with quote

Hi, I wouldn't rule out a defective fuel pump. We
had a few over the yrs. Unbolt and pull away from
the block while the lines are hooked up and lv
overnite and see if it leaks. Chuck
 
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